Figure 1 of Azartash, Mol Vis 2011; 17:756-767.

Figure 1. An schematic of the physical principles and the components in FASIC setup. The low-power, 635 CW laser (L) illuminates the ocular surface at an incident angle of θ. The cMOS camera (C) is connected to a 1× objective lens (O) through an extender tube (E) captures the images at an observation angle of β.